Calibre 937, 38 jewels, gloss sunray indigo dial, the flange with aperture for the bidirectional rotating disc bearing the names of the world's major cities, sweep centre seconds, two recessed engine-turned subdials for the date and second time with am/pm indication, sector for power-reserve indication, three-part case with hinge engraved dustcover over a display back, crown at 10 for city disc correction, platinum JL deployant clasp, case, dial and movement signed
Diameter: 38 mm.